However vertex_for_first_force is a Vertex object. So we put it in parenthesis and add a comma indicating a sequence, and it becomes a Region object.
If you want to change selection, open document below and click on "Move attachment"
- (no access) - PYTHON SCRIPTS FOR ABAQUS.pdf, p159
|status||not read|| ||reprioritisations|
|last reprioritisation on|| ||suggested re-reading day|
|started reading on|| ||finished reading on|